Almost exactly the same with iPhone 5s.
The GPS processor is the cellular chips themselves. They are located at the lower half of the board.
There is an RF bridge cable running across the board to the top, where the antenna is.
On the upper half of the board, there are multiplexers, LNAs, filters, etc. RF stuff.
The antenna feed point is at the very top of the board, bottom side, next to a screw hole. GPS and cellular signal shares the same antenna, the top bezel itself.
There is a screw and a metal clip connecting the antenna feed point to the top bezel. Forgetting one of them may resulting poor cellular reception, slow cellular download and no GPS.
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